CN2871994Y - Cut-off valve for small-bore power station - Google Patents
Cut-off valve for small-bore power station Download PDFInfo
- Publication number
- CN2871994Y CN2871994Y CN 200620000672 CN200620000672U CN2871994Y CN 2871994 Y CN2871994 Y CN 2871994Y CN 200620000672 CN200620000672 CN 200620000672 CN 200620000672 U CN200620000672 U CN 200620000672U CN 2871994 Y CN2871994 Y CN 2871994Y
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- CN
- China
- Prior art keywords
- valve
- packing
- valve body
- plane
- filler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012856 packing Methods 0.000 claims abstract description 30
- 210000004907 gland Anatomy 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000000945 filler Substances 0.000 claims description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910002804 graphite Inorganic materials 0.000 claims description 7
- 239000010439 graphite Substances 0.000 claims description 7
- 238000009954 braiding Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 9
- 230000008439 repair process Effects 0.000 abstract description 2
- 230000009471 action Effects 0.000 abstract 1
- 230000006872 improvement Effects 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000013461 design Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 229910001374 Invar Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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- Taps Or Cocks (AREA)
- Details Of Valves (AREA)
Abstract
The utility model relates to a minor-caliber stop valve for power station, comprising a valve body, a high pressure seal ring, a detachable valve seat, a valve stem, a packing bed, a packing, a packing gland and a control switch. The valve body is arranged with a big hole, a moderate hole, a small hole and an annular notch, which is communicated with a water inlet hole of the stop valve, and also comprises a top surface ball and a positioning guide sleeve. A round groove, inside which the top surface ball is arranged, is arranged at the bottom of the valve stem. And the top surface of the ball presses against the bottom surface of the round groove. The ball in the art rotates merely in radial direction under the action of high pressure media thus the model is good for seal. And the higher the pressure is, the better the sealing effect is, and the period of usage of the valve is lengthened; the positioning hold-down structure is formed by the valve body, the high pressure seal ring, the detachable valve seat, the positioning guide sleeve, the packing bed, the packing and the packing gland from bottom to top; the utility model has the advantages of increase in seal specific pressure due to wedge effect, improvement of packing seal, good exchangeability, simple manufacturing process, safety and reliability, convenience of assembly and disassembly and repair.
Description
Technical field
The utility model relates to the stop valve of extensive use in a kind of electric power, oil, chemical industry, the field of metallurgy, is meant the small-bore power station of the High Temperature High Pressure stop valve that generally adopts in the thermal power plant especially.
Background technique
The small-bore stop valve of High Temperature High Pressure, mainly be to be used for electric power, oil, chemical industry, metallurgical four major trades, wherein power industry is for improving generating efficiency, cutting down the consumption of energy, generator 's parameter significantly improves in country, and is therefore more outstanding in the demand of quality and quantitative aspects with stop valve to the small-bore power station of High Temperature High Pressure.
At present, small-bore High Temperature Pressure Power Station Globe Valves of the prior art is in performance and qualitatively can not be satisfactory, and the phenomenon of its run, drip, leak is very outstanding, also is a manufacturer and the insurmountable difficult problem of operation and maintenance personnel.
Traditional small-bore power station stop valve, no matter how its structure changes, the primary seal pair mostly is the conical surface, plane or ball face sealing greatly, and primary seal secondary be pile-up welding hard alloy on flap and valve body for the conical surface or plane, this measure has often only been considered the sealing of short-term to high temperature and high pressure condition, but does not guarantee long term reliability; Most of products, though can be qualified by factory inspection, but but can not pass through cold and hot trial, keep in repair inconvenient, time-consuming, labor intensity is big, and ball face sealing invar ball is under the high-pressure medium of operating mode promotes, can constantly change the contact position of ball face sealing, on steel ball, form many valve lines.But if two or many valve lines intersections, so, sealing surface will cause leakage, form the negative pressure boiling and make the ball face sealing pair very fast destroyed under the washing away of high-pressure medium, have a strong impact on the safe operation of unit and the economic benefit of power plant.
Summary of the invention
The utility model provides a kind of rational in infrastructure, the small-bore power station of combination property good high-temperature high pressure stop valve, pass through present design, two or many valve line crossover phenomenons have been stopped on the steel ball of stop valve, to occur, handle through wedge effect, sealing effect is improved greatly, thereby remedied deficiency of the prior art.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of small-bore power station stop valve, it includes valve body, high-pressure seal ring, detachable valve seat, valve rod, Packing seat, filler, Gland and control switch, be provided with big mesopore and circular groove in the described valve body, described circular groove is connected with the water inlet of stop valve, the big mesopore of described valve body bottom is provided with high-pressure seal ring, be provided with detachable valve seat above it, described valve rod is inserted in the big mesopore of valve body, described Packing seat and filler are arranged between valve body and valve rod, described Gland is arranged on the filler top, and be pressed on the filler downwards, it also includes top plane ball and positioning and guiding cover, described valve rod end is provided with the bottom and is the circular groove on plane, plane, described top ball is arranged in the circular groove, and the base plane of its circular groove is pressed on the plane, top of plane, top ball; Described positioning and guiding cover is sleeved on the outside of stem lower portion, and the bottom of positioning and guiding cover is provided with pod apertures, and the lower end of positioning and guiding cover is pressed on the detachable valve seat.
Described Packing seat and filler upwards are arranged on the top of positioning and guiding cover successively, and being provided with the plane with contacted Gland of filler and Packing seat is 10 ° to 20 ° chamfering.
Described filler is two-layer up and down for braiding strengthens graphite packing, and the centre is graphite packing.
Described be connected with the valve body circular groove for the water inlet, what be connected with the little mesopore lower position of valve body is osculum.
Small-bore power station of the present utility model stop valve is formed from down to up a location compressing structure in this order by valve body, high-pressure seal ring, detachable valve seat, positioning and guiding cover, Packing seat, filler, Gland.
Describedly form automatic guide centering sealing configuration by top plane ball, valve rod, positioning and guiding cover, detachable valve seat and high pressure sealing pad.
The small-bore power station of the utility model with the beneficial effect of stop valve is:
1. owing to adopt plane, top ball design of Sealing Structure, make spheroid do radially rotation following of the effect of high-pressure medium, thereby avoid the integrated type steel ball, arbitrarily rotation and the sealing pair that causes the valve line to intersect to cause is washed away and make valve leak under the high-pressure medium effect, thereby improved the working life of valve.
2. owing to adopt automatic guide centering structure, during valve opening, plane, top ball is subjected to the protection of positioning and guiding cover, is not subjected to washing away of medium; Adding that medium is counter flows design, helps valve seal when making valve closing, and pressure is high more, and sealing effect is good more.
3. counter to flow design be high in and low out owing to adopt medium, improved the sealing effect of valve, and stressed reducing when valve rod is closed, thereby can dwindle the diameter of valve rod and make the volume-diminished of valve.
4. because the up and down two-layer employing braiding of stuffing box strengthens graphite packing, handle through wedge effect, being respectively arranged with the plane with contacted Gland of filler and Packing seat end face is 10 ° to 20 ° chamfering, has increased seal pressure, has improved the sealability of filler.
5. the product interchangeability of present design is strong, helps user's maintenance, and preparation process is simplified, cost is low, is convenient to processing and detection, and this product safety is reliable, easy for assembly, disassembly and maintenance, has reduced labor intensity; When control switch adopts electronic control, can reduce requirement to the Electric actuator output torque, the Electric actuator of optional so less moment of torsion matches, thereby has reduced the cost of equipment.
Description of drawings
Fig. 1 manually controls small-bore power station stop valve cross-sectional view.
Fig. 2 is the small-bore power station of an electronic control stop valve cross-sectional view.
Among the figure, 1 control switch, 2 valve rods, 3 Glands, 4 positioning and guiding covers, 5 pod apertures, 6 water inlets, 7 valve bodies, 8 high-pressure seal rings, 9 little mesopores, plane, 10 top ball, 11 circular grooves, 12 osculums, 13 detachable valve seats, 14 circular grooves, 15 Packing seats, 16 fillers.
Below in conjunction with accompanying drawing the utility model is described further.
Specific embodiments
As shown in the figure, the small-bore power station stop valve that the utility model relates to, it includes valve body 7, high-pressure seal ring 8, detachable valve seat 13, valve rod 2, Packing seat 15, filler 16, Gland 3 and control switch 1, be provided with circular groove 11 and little mesopore 9 in the described valve body 7, described circular groove and little mesopore 9 are connected with the water inlet 6 and the osculum 12 of stop valve respectively, described big mesopore bottom is provided with high-pressure seal ring 8, be provided with detachable valve seat 13 above it, described valve rod 2 is inserted in the big mesopore of valve body, described Packing seat 15 and filler 16 are arranged on 2 of valve body 7 and valve rods, described Gland 3 is arranged on filler 16 tops, and be pressed on downwards on the filler 16, it also includes top plane ball 10 and positioning and guiding cover 4, described valve rod 2 ends are provided with the bottom and are the circular groove 14 on plane, plane, described top ball 10 is arranged in the circular groove 14, and the base plane of its circular groove 14 is pressed on the plane, top of plane, top ball 10; Described positioning and guiding cover 4 is sleeved on the outside of valve rod 2 bottoms, and the bottom of positioning and guiding cover 4 is provided with pod apertures 5, and the lower end of positioning and guiding cover 4 is pressed on the detachable valve seat 13.
Described Packing seat 15 and filler 16 upwards are arranged on the top of positioning and guiding cover successively, are provided with the chamfering that constitutes 10 ° to 20 ° with the plane at the end face with contacted Gland of filler and Packing seat.
Described filler is two-layer for braiding strengthens graphite packing about in the of 16, and middle is graphite packing.
In described water inlet 6 and the osculum 12, be positioned at be connected with the valve body circular groove for water inlet 6, be positioned at be connected with little mesopore 9 lower positions of valve body be osculum 12.
Control switch in the small-bore High Temperature Pressure Power Station Globe Valves of the utility model can adopt hand control switch, also can adopt electric controling switch.
The plane chamfering of Packing seat is 10 ° to 20 ° among the embodiment of the present utility model; Described detachable valve seat 13 has cobalt base hard alloy with top plane ball 10 contacted surface overlayings; The lower end of described positioning and guiding cover 4 is pressed on the seam of detachable valve seat 13.
Claims (4)
1. small-bore power station stop valve, it includes valve body, high-pressure seal ring, detachable valve seat, valve rod, Packing seat, filler, Gland and control switch, be provided with big or small mesopore and circular groove in the described valve body, described big mesopore bottom is provided with circular groove and is connected with the water inlet of stop valve, the big mesopore of described valve body bottom surface is provided with high-pressure seal ring, be provided with detachable valve seat above it, described valve rod is inserted in the big mesopore of valve body, described Packing seat and filler are arranged between valve body and valve rod, described Gland is arranged on the filler top, and be pressed on the filler downwards, it is characterized in that: it also includes top plane ball and positioning and guiding cover, described valve rod end is provided with the bottom and is the circular groove on plane, plane, described top ball is arranged in the circular groove, and the base plane of its circular groove is pressed on the plane, top of plane, top ball; Described positioning and guiding cover is sleeved on the outside of stem lower portion, and the bottom of positioning and guiding cover is provided with pod apertures, and the lower end of positioning and guiding cover is pressed on the detachable valve seat.
2. small-bore power station according to claim 1 stop valve, it is characterized in that: described Packing seat and filler upwards are arranged on the top of positioning and guiding cover successively, and being provided with the plane at the end face with contacted Gland of filler and Packing seat is 10 ° to 20 ° chamfering.
3. small-bore power station according to claim 1 and 2 stop valve is characterized in that: described filler is two-layer up and down for braiding strengthens graphite packing, and the centre is graphite packing.
4, small-bore power station according to claim 1 stop valve is characterized in that: in described water inlet and the osculum, be positioned at the water inlet that is that is connected with the valve body circular groove, be positioned at the osculum that is that is connected with the little mesopore lower position of valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000672 CN2871994Y (en) | 2006-01-11 | 2006-01-11 | Cut-off valve for small-bore power station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620000672 CN2871994Y (en) | 2006-01-11 | 2006-01-11 | Cut-off valve for small-bore power station |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2871994Y true CN2871994Y (en) | 2007-02-21 |
Family
ID=37740342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620000672 Expired - Fee Related CN2871994Y (en) | 2006-01-11 | 2006-01-11 | Cut-off valve for small-bore power station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2871994Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907172A (en) * | 2009-06-02 | 2010-12-08 | 上海华电阀门集团有限公司 | Anti-leakage valve structure |
-
2006
- 2006-01-11 CN CN 200620000672 patent/CN2871994Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101907172A (en) * | 2009-06-02 | 2010-12-08 | 上海华电阀门集团有限公司 | Anti-leakage valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING DONGFANG RUIXING TECHNOLOGY & TRADE CO., Free format text: FORMER OWNER: CHEN LULU Effective date: 20070601 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070601 Address after: 100044 B2-803 building, 5 building, No. 9, car main street, Xicheng District, Beijing Patentee after: Beijing Oriental Ruixing Kemao limited liability company Address before: Mochouhu road Nanjing city Jiangsu province 210029 No. 9 building 12 room 607 Patentee before: Chen Lulu |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070221 Termination date: 20140111 |